APPENDIX B - EXAMPLE DRILL SCENARIOS
Normal Control Area Heating and Ventilation Failure
Drill Number: 010-02
Revision Number: 0
Initial Conditions: Control Area H&V on line at time of initiation.
Pre-drill Notifications: Mark appropriate space as notifications are made.
Precautions and Limitations: None.
Technical Safety Requirements: Control Room Environment Inst. 17.3/126.96.36.199, 188.8.131.52
Drill Team Duties: The main concern of the Drill Coordinator should be that the response is
handled logically using procedures and drawings.
Evaluator: The drill evaluator in the control room evaluates control room procedure use,
controlled drawing use, and problem solving actions. Field drill evaluator
evaluates Shift Supervisor actions.
Terminate if Control Room environment becomes uncomfortable, and
have ventilation restored.
Drill Initiation: B20 Breaker 29 (supply to B20A) or S42-B20A is opened, resulting in a C-418
alarm due to the loss of E521, E522, E519M1 & M2, R519 and R52l.
Expected Response/Evaluation Criteria:
The Control Room dispatches an operator to C-418 in response to the alarm. The SS
watch reports the loss of Control Area H&V and that fault alarms won't clear. The CRA
verifies C177B is not the cause.
System knowledge and P&ID's should lead to checking B20A. SS finds the breaker in a
tripped condition and attempts to reclose it with Control Room permission. The breaker
will not reclose and actions are initiated to get the RSS to fix it.